To Charge The Second Battery Pack - Sony VAIO PCG-GR250 User Manual

Change text in this variable definition to document title.
Using weight saver for second battery cover
Battery pack
Keep the battery pack in the notebook while it is connected to AC power. The
battery indicator flashes while the battery is charging. See also "To charge the
battery pack" in the printed Quick Start for more information.

To charge the second battery pack

Charging the second battery
To determine the amount of time the battery lasts, see "Displaying Battery
Information" for details.
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Weight saver
Battery indicators